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Multiple Choice
Most human cancers are __________.
A
caused by viruses
B
inherited from one parent, like an autosomal dominant allele
C
inherited from both parents, like an autosomal recessive allele
D
caused by radiation
E
caused by the accumulation of somatic mutations
Verified step by step guidance
1
Understand the nature of cancer: Cancer is a disease characterized by uncontrolled cell growth and division, which can lead to the formation of tumors and spread throughout the body.
Recognize the role of mutations: Mutations are changes in the DNA sequence. In the context of cancer, somatic mutations occur in non-reproductive cells and accumulate over a person's lifetime, contributing to cancer development.
Differentiate between somatic and inherited mutations: Somatic mutations are acquired during a person's life and are not inherited from parents. In contrast, inherited mutations are passed down from one or both parents and are present in all cells from birth.
Identify common causes of somatic mutations: These can include environmental factors such as exposure to radiation, chemicals, and viruses, which can damage DNA and lead to mutations.
Conclude that most human cancers are caused by the accumulation of somatic mutations: While some cancers can be linked to inherited genetic factors or external causes like viruses and radiation, the majority result from the gradual accumulation of somatic mutations over time.